यदि किसी संख्या का एक-चौथाई (1/4) 72 है, तो उस संख्या का दो-तिहाई (2/3) क्या होगा?

An institution has 5 classes containing 50, 60, 25, 40, and 70 students. The pass percentages of these 5 classes are 20%, 25%, 20%, 10%, and 30% respectively. Find the average number of passed students per class in the institution.

If the Consumer Price Index (CPI) increases from 125 in 1995 to 140 in 1996, what is the annual rate of inflation?